A revision of the first Asteropyginae (Trilobita; Devonian)

Autores
Bignon, Arnaud Marcel Jacques; Corbacho, Joan; López-Soriano, Francisco J.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A recent cladistic analysis of the Asteropyginae led to the recognition of the genus Minicryphaeus as one of the most ancestral of this subfamily. A new species, M.giganteus, is described here from the Ihandar Formation (Pragian, Lower Devonian) of Jbel El Mrakib, southern part of the Mader Basin (Morocco). Among other characteristic features, it is almost three times larger than the other species of the genus. The description of this new species provides information on the ancestral character states of the subfamily and necessitated a revision of the oldest known representatives. Moreover, this recent analysis identified Treveropyge as a derived form of asteropygines, whereas it was traditionally considered as ancestral due to one of its oldest species, now Ganetops ebbae nov. comb., which was formerly included in this genus. In order to offer a better view of the ancestral Asteropyginae, the features of M.giganteus nov. sp. and G.ebbae nov. comb. have been coded following the scheme of the previous cladistic analysis. The updated phylogeny reveals that M.giganteus nov. sp. is the sister-group of the other Minicryphaeus species; a paedomorphic event explains their decreasing size. The new phylogeny confirms the basal position of G.ebbae nov. comb. and distinguishes it clearly from the genus Treveropyge, which necessitates the erection of the new genus Ganetops. It appears that the association of G.ebbae nov. comb. with more derived species within the genus Treveropyge disturbed the previous cladistics analysis of the Asteropyginae. Indeed, considering a derived species as root of the subfamily leads necessarily to the formation of two major clades, as it was usually suggested for the Asteropyginae.
Fil: Bignon, Arnaud Marcel Jacques. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Corbacho, Joan. Museo Geológico del Seminario; España
Fil: López-Soriano, Francisco J.. Universidad de Barcelona; España
Materia
ACASTIDAE
CLADISTICS
LOCHKOVIAN
MOROCCO
PRAGIAN
SYSTEMATICS PALAEONTOLOGY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/133928
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/133928
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling A revision of the first Asteropyginae (Trilobita; Devonian)Bignon, Arnaud Marcel JacquesCorbacho, JoanLópez-Soriano, Francisco J.ACASTIDAECLADISTICSLOCHKOVIANMOROCCOPRAGIANSYSTEMATICS PALAEONTOLOGYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A recent cladistic analysis of the Asteropyginae led to the recognition of the genus Minicryphaeus as one of the most ancestral of this subfamily. A new species, M.giganteus, is described here from the Ihandar Formation (Pragian, Lower Devonian) of Jbel El Mrakib, southern part of the Mader Basin (Morocco). Among other characteristic features, it is almost three times larger than the other species of the genus. The description of this new species provides information on the ancestral character states of the subfamily and necessitated a revision of the oldest known representatives. Moreover, this recent analysis identified Treveropyge as a derived form of asteropygines, whereas it was traditionally considered as ancestral due to one of its oldest species, now Ganetops ebbae nov. comb., which was formerly included in this genus. In order to offer a better view of the ancestral Asteropyginae, the features of M.giganteus nov. sp. and G.ebbae nov. comb. have been coded following the scheme of the previous cladistic analysis. The updated phylogeny reveals that M.giganteus nov. sp. is the sister-group of the other Minicryphaeus species; a paedomorphic event explains their decreasing size. The new phylogeny confirms the basal position of G.ebbae nov. comb. and distinguishes it clearly from the genus Treveropyge, which necessitates the erection of the new genus Ganetops. It appears that the association of G.ebbae nov. comb. with more derived species within the genus Treveropyge disturbed the previous cladistics analysis of the Asteropyginae. Indeed, considering a derived species as root of the subfamily leads necessarily to the formation of two major clades, as it was usually suggested for the Asteropyginae.Fil: Bignon, Arnaud Marcel Jacques. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Corbacho, Joan. Museo Geológico del Seminario; EspañaFil: López-Soriano, Francisco J.. Universidad de Barcelona; EspañaElsevier France-editions Scientifiques Medicales Elsevier2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/133928Bignon, Arnaud Marcel Jacques; Corbacho, Joan; López-Soriano, Francisco J.; A revision of the first Asteropyginae (Trilobita; Devonian); Elsevier France-editions Scientifiques Medicales Elsevier; Geobios; 47; 5; 9-2014; 281-2890016-6995CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016699514000643info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2014.09.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:53:08Zoai:ri.conicet.gov.ar:11336/133928instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:53:08.616CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A revision of the first Asteropyginae (Trilobita; Devonian)
title A revision of the first Asteropyginae (Trilobita; Devonian)
spellingShingle A revision of the first Asteropyginae (Trilobita; Devonian)
Bignon, Arnaud Marcel Jacques
ACASTIDAE
CLADISTICS
LOCHKOVIAN
MOROCCO
PRAGIAN
SYSTEMATICS PALAEONTOLOGY
title_short A revision of the first Asteropyginae (Trilobita; Devonian)
title_full A revision of the first Asteropyginae (Trilobita; Devonian)
title_fullStr A revision of the first Asteropyginae (Trilobita; Devonian)
title_full_unstemmed A revision of the first Asteropyginae (Trilobita; Devonian)
title_sort A revision of the first Asteropyginae (Trilobita; Devonian)
dc.creator.none.fl_str_mv Bignon, Arnaud Marcel Jacques
Corbacho, Joan
López-Soriano, Francisco J.
author Bignon, Arnaud Marcel Jacques
author_facet Bignon, Arnaud Marcel Jacques
Corbacho, Joan
López-Soriano, Francisco J.
author_role author
author2 Corbacho, Joan
López-Soriano, Francisco J.
author2_role author
author
dc.subject.none.fl_str_mv ACASTIDAE
CLADISTICS
LOCHKOVIAN
MOROCCO
PRAGIAN
SYSTEMATICS PALAEONTOLOGY
topic ACASTIDAE
CLADISTICS
LOCHKOVIAN
MOROCCO
PRAGIAN
SYSTEMATICS PALAEONTOLOGY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A recent cladistic analysis of the Asteropyginae led to the recognition of the genus Minicryphaeus as one of the most ancestral of this subfamily. A new species, M.giganteus, is described here from the Ihandar Formation (Pragian, Lower Devonian) of Jbel El Mrakib, southern part of the Mader Basin (Morocco). Among other characteristic features, it is almost three times larger than the other species of the genus. The description of this new species provides information on the ancestral character states of the subfamily and necessitated a revision of the oldest known representatives. Moreover, this recent analysis identified Treveropyge as a derived form of asteropygines, whereas it was traditionally considered as ancestral due to one of its oldest species, now Ganetops ebbae nov. comb., which was formerly included in this genus. In order to offer a better view of the ancestral Asteropyginae, the features of M.giganteus nov. sp. and G.ebbae nov. comb. have been coded following the scheme of the previous cladistic analysis. The updated phylogeny reveals that M.giganteus nov. sp. is the sister-group of the other Minicryphaeus species; a paedomorphic event explains their decreasing size. The new phylogeny confirms the basal position of G.ebbae nov. comb. and distinguishes it clearly from the genus Treveropyge, which necessitates the erection of the new genus Ganetops. It appears that the association of G.ebbae nov. comb. with more derived species within the genus Treveropyge disturbed the previous cladistics analysis of the Asteropyginae. Indeed, considering a derived species as root of the subfamily leads necessarily to the formation of two major clades, as it was usually suggested for the Asteropyginae.
Fil: Bignon, Arnaud Marcel Jacques. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Corbacho, Joan. Museo Geológico del Seminario; España
Fil: López-Soriano, Francisco J.. Universidad de Barcelona; España
description A recent cladistic analysis of the Asteropyginae led to the recognition of the genus Minicryphaeus as one of the most ancestral of this subfamily. A new species, M.giganteus, is described here from the Ihandar Formation (Pragian, Lower Devonian) of Jbel El Mrakib, southern part of the Mader Basin (Morocco). Among other characteristic features, it is almost three times larger than the other species of the genus. The description of this new species provides information on the ancestral character states of the subfamily and necessitated a revision of the oldest known representatives. Moreover, this recent analysis identified Treveropyge as a derived form of asteropygines, whereas it was traditionally considered as ancestral due to one of its oldest species, now Ganetops ebbae nov. comb., which was formerly included in this genus. In order to offer a better view of the ancestral Asteropyginae, the features of M.giganteus nov. sp. and G.ebbae nov. comb. have been coded following the scheme of the previous cladistic analysis. The updated phylogeny reveals that M.giganteus nov. sp. is the sister-group of the other Minicryphaeus species; a paedomorphic event explains their decreasing size. The new phylogeny confirms the basal position of G.ebbae nov. comb. and distinguishes it clearly from the genus Treveropyge, which necessitates the erection of the new genus Ganetops. It appears that the association of G.ebbae nov. comb. with more derived species within the genus Treveropyge disturbed the previous cladistics analysis of the Asteropyginae. Indeed, considering a derived species as root of the subfamily leads necessarily to the formation of two major clades, as it was usually suggested for the Asteropyginae.
publishDate 2014
dc.date.none.fl_str_mv 2014-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/133928
Bignon, Arnaud Marcel Jacques; Corbacho, Joan; López-Soriano, Francisco J.; A revision of the first Asteropyginae (Trilobita; Devonian); Elsevier France-editions Scientifiques Medicales Elsevier; Geobios; 47; 5; 9-2014; 281-289
0016-6995
CONICET Digital
CONICET
url http://hdl.handle.net/11336/133928
identifier_str_mv Bignon, Arnaud Marcel Jacques; Corbacho, Joan; López-Soriano, Francisco J.; A revision of the first Asteropyginae (Trilobita; Devonian); Elsevier France-editions Scientifiques Medicales Elsevier; Geobios; 47; 5; 9-2014; 281-289
0016-6995
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0016699514000643
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geobios.2014.09.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier France-editions Scientifiques Medicales Elsevier
publisher.none.fl_str_mv Elsevier France-editions Scientifiques Medicales Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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